HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by Clawson, E. L. Articles by Blouin, D. C. Search for Related Content PubMed Articles by Clawson, E. L. Articles by Blouin, D. C. Agricola Articles by Clawson, E. L. Articles by Blouin, D. C. Related Collections Crop Growth and Development Crop Physiology & Metabolism Other Cropping Systems Cotton Plant Nutrition

Production Papers

Nitrogen Fertilization and Yield of Cotton in Ultra-Narrow and Conventional Row Spacings

^a Lousiana State Univ. Agric. Cent., P.O. Box 438, Saint Joseph, LA 71366
^b Texas A&M Univ., Dep. of Soil and Crop Sciences, College Station, TX 77843-2474
^c Lousiana State Univ., Dep. of Experimental Statistics, 161 Agric. Administration Building, Baton Rouge, LA 70803-5606

^* Corresponding author (eclawson{at}agcenter.lsu.edu)

Received for publication February 1, 2005. Nitrogen fertilizer requirements of ultra-narrow row (UNR) cotton (Gossypium hirsutum L.) are not well established, and lint yield of UNR relative to conventional-row (CR) cotton has been variable. Objectives of this study were to compare UNR and CR N requirements based on lint yield, fiber quality, and plant architecture, and to compare the yield potential of UNR and CR cotton. The location was the Texas Agricultural Experiment Station Farm, Burleson County, TX. Treatments were N fertilizer rates of 0, 50, 101, and 151 kg ha^–1 and row spacings of 19, 38 (both UNR), and 76 cm (CR). By design, per-hectare plant populations were greatest in 19- and least in 76-cm row spacings. Plots were hand harvested. Reductions in row spacing decreased plant height, main stem nodes plant^–1, and subset (first position bolls at nodes 6–10) individual boll weight. Greater N increased plant height, main stem nodes plant^–1, and both whole-plant and subset individual boll weight. Lint percentage was increased by reduction in row spacing and not affected by N. Treatment effects on fiber quality were limited. Lint yield did not differ among row spacings. Significant increases in lint yield occurred with each increase in N, suggesting that the optimal N rate was not surpassed. Nitrogen by row spacing interaction on lint yield was not significant, implying a similar response of each row spacing to N over the fertilizer rates tested. The N fertilizer requirements of UNR do not appear to be lower than those of CR cotton.

Abbreviations: CR, conventional-row • HVI, high volume instrument • UNR, ultra-narrow row

This article has been cited by other articles:

				R. P. Viator, C. O. Gwathmey, J. T. Cothren, J. T. Reed, E. D. Vories, R. C. Nuti, K. L. Edmisten, and R. Wells Influence of Ultranarrow Row and Conventional Row Cotton on the Last Effective Boll Population Agron. J., August 11, 2008; 100(5): 1327 - 1331. [Abstract] [Full Text] [PDF]

				E. L. Clawson, J. T. Cothren, D. C. Blouin, and J. L. Satterwhite Timing of Maturity in Ultra-Narrow and Conventional Row Cotton as Affected by Nitrogen Fertilizer Rate Agron. J., February 29, 2008; 100(2): 421 - 431. [Abstract] [Full Text] [PDF]